How to add subtitles to a video
Automatic, manual, burned-in, or SRT — here's how to add subtitles to a video the right way for short-form, and the small decisions that make or break readability.
6 minute read
Automatic vs manual subtitles
Typing subtitles by hand and syncing them line by line is accurate but slow, and for anything longer than a minute it's rarely worth it. Automatic subtitle tools transcribe the speech and place timed text for you, then let you fix the few words they miss. For short-form clips, automatic-then-edit is almost always the right workflow: you get most of the way there instantly and spend your time only on corrections.
Burned-in vs SRT files
An SRT is a separate subtitle file you upload alongside the video; burned-in subtitles are baked into the picture. For social platforms, burned-in is safer — the text plays the same everywhere, can't be turned off, and isn't re-rendered by each app's native caption system. SRT makes sense when a platform needs an editable transcript, but for Shorts, Reels, and TikTok, burn them in.
Style for sound-off viewing
Most short-form viewers watch on mute, so subtitles are part of the design, not an afterthought. Word-by-word highlighting that tracks the speech holds attention better than static blocks. Keep the type large, high-contrast, and clear of platform overlays like the TikTok caption bar so nothing important gets covered.
Fix the words that matter before you export
Every auto-subtitle tool mishears names, brands, and jargon. The tools worth using keep the text editable until export so you can correct a name or rewrite a line against the real footage. If a tool locks the subtitles the moment they're generated, fixing one word means regenerating the whole clip — check for that before you commit.
Doing it in FrameOS
FrameOS generates subtitles as part of producing a clip: bring in a video, and it transcribes, times, and styles word-by-word captions you can edit and restyle, then burns them in at export. Because it's built for clips, the subtitles come reframed and placed for vertical short-form rather than bolted onto a landscape file.
FAQ
What's the fastest way to add subtitles to a video?
Use an automatic subtitle generator that transcribes the speech for you, then correct the few words it misses. Hand-syncing every line is only worth it for very short or very high-stakes clips.
Should subtitles be burned in or a separate file?
For social platforms, burn them in — they play consistently everywhere and can't be stripped or re-rendered. Use an SRT file only when a platform specifically needs an editable transcript.
Can I edit auto-generated subtitles?
With the right tool, yes. FrameOS keeps subtitle text and styling editable until export so you can fix a misheard name before the clip is rendered.
Related pages
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CapCut transcribes a clip in seconds. The five minutes after that — corrections, line breaks, styling and placement — are what separate readable subtitles from a wall of text.
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Burned-in captions are subtitles baked into the video itself, so they always appear and can't be turned off. Here's when to use them versus closed captions.
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